| [3] | 1 | MODULE step |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE step *** |
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| 4 | !! Time-stepping : manager of the ocean, tracer and ice time stepping |
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| 5 | !!====================================================================== |
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| [1438] | 6 | !! History : OPA ! 1991-03 (G. Madec) Original code |
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| [1492] | 7 | !! - ! 1991-11 (G. Madec) |
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| 8 | !! - ! 1992-06 (M. Imbard) add a first output record |
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| 9 | !! - ! 1996-04 (G. Madec) introduction of dynspg |
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| 10 | !! - ! 1996-04 (M.A. Foujols) introduction of passive tracer |
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| [1438] | 11 | !! 8.0 ! 1997-06 (G. Madec) new architecture of call |
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| 12 | !! 8.2 ! 1997-06 (G. Madec, M. Imbard, G. Roullet) free surface |
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| 13 | !! - ! 1999-02 (G. Madec, N. Grima) hpg implicit |
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| 14 | !! - ! 2000-07 (J-M Molines, M. Imbard) Open Bondary Conditions |
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| 15 | !! NEMO 1.0 ! 2002-06 (G. Madec) free form, suppress macro-tasking |
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| 16 | !! - ! 2004-08 (C. Talandier) New trends organization |
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| [1492] | 17 | !! - ! 2005-01 (C. Ethe) Add the KPP closure scheme |
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| 18 | !! - ! 2005-11 (G. Madec) Reorganisation of tra and dyn calls |
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| 19 | !! - ! 2006-01 (L. Debreu, C. Mazauric) Agrif implementation |
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| 20 | !! - ! 2006-07 (S. Masson) restart using iom |
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| [1438] | 21 | !! 3.2 ! 2009-02 (G. Madec, R. Benshila) reintroduicing z*-coordinate |
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| [1533] | 22 | !! - ! 2009-06 (S. Masson, G. Madec) TKE restart compatible with key_cpl |
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| [2236] | 23 | !! 3.3 ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface |
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| 24 | !! - ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase + merge TRC-TRA |
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| [3] | 25 | !!---------------------------------------------------------------------- |
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| [888] | 26 | |
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| 27 | !!---------------------------------------------------------------------- |
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| [3] | 28 | !! stp : OPA system time-stepping |
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| 29 | !!---------------------------------------------------------------------- |
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| [2027] | 30 | USE step_oce ! time stepping definition modules |
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| [2104] | 31 | #if defined key_top |
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| 32 | USE trcstp ! passive tracer time-stepping (trc_stp routine) |
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| 33 | #endif |
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| [3] | 34 | |
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| [2239] | 35 | USE zdfgls ! generic length scale case |
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| [2236] | 36 | USE asminc ! assimilation increments (tra_asm_inc, dyn_asm_inc routines) |
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| 37 | USE stpctl ! time stepping control (stp_ctl routine) |
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| 38 | USE restart ! ocean restart (rst_wri routine) |
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| 39 | USE prtctl ! Print control (prt_ctl routine) |
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| 40 | |
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| 41 | #if defined key_agrif |
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| 42 | USE agrif_opa_sponge ! Momemtum and tracers sponges |
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| 43 | #endif |
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| 44 | |
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| [3] | 45 | IMPLICIT NONE |
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| 46 | PRIVATE |
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| 47 | |
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| [1492] | 48 | PUBLIC stp ! called by opa.F90 |
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| [3] | 49 | |
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| 50 | !! * Substitutions |
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| 51 | # include "domzgr_substitute.h90" |
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| 52 | # include "zdfddm_substitute.h90" |
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| 53 | !!---------------------------------------------------------------------- |
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| [2104] | 54 | !! NEMO/OPA 3.3 , LOCEAN-IPSL (2010) |
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| [888] | 55 | !! $Id$ |
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| [2236] | 56 | !! Software governed by the CeCILL licence (NEMOGCM/License_CeCILL.txt) |
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| [3] | 57 | !!---------------------------------------------------------------------- |
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| 58 | |
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| 59 | CONTAINS |
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| 60 | |
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| [508] | 61 | #if defined key_agrif |
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| 62 | SUBROUTINE stp( ) |
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| [1438] | 63 | INTEGER :: kstp ! ocean time-step index |
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| [508] | 64 | #else |
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| [467] | 65 | SUBROUTINE stp( kstp ) |
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| [1438] | 66 | INTEGER, INTENT(in) :: kstp ! ocean time-step index |
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| [467] | 67 | #endif |
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| 68 | !!---------------------------------------------------------------------- |
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| [3] | 69 | !! *** ROUTINE stp *** |
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| 70 | !! |
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| 71 | !! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.) |
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| 72 | !! - Time stepping of LIM (dynamic and thermodynamic eqs.) |
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| 73 | !! - Tme stepping of TRC (passive tracer eqs.) |
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| 74 | !! |
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| 75 | !! ** Method : -1- Update forcings and data |
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| 76 | !! -2- Update ocean physics |
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| 77 | !! -3- Compute the t and s trends |
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| 78 | !! -4- Update t and s |
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| 79 | !! -5- Compute the momentum trends |
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| 80 | !! -6- Update the horizontal velocity |
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| 81 | !! -7- Compute the diagnostics variables (rd,N2, div,cur,w) |
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| 82 | !! -8- Outputs and diagnostics |
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| 83 | !!---------------------------------------------------------------------- |
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| [888] | 84 | INTEGER :: jk ! dummy loop indice |
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| [3] | 85 | INTEGER :: indic ! error indicator if < 0 |
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| 86 | !! --------------------------------------------------------------------- |
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| 87 | |
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| [392] | 88 | #if defined key_agrif |
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| [389] | 89 | kstp = nit000 + Agrif_Nb_Step() |
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| [1953] | 90 | # if defined key_iomput |
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| [2104] | 91 | IF( Agrif_Nbstepint() == 0 ) CALL iom_swap |
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| [1953] | 92 | # endif |
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| [389] | 93 | #endif |
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| [2104] | 94 | indic = 0 ! reset to no error condition |
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| [2200] | 95 | IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init) |
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| [2104] | 96 | CALL iom_setkt( kstp ) ! say to iom that we are at time step kstp |
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| [508] | 97 | |
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| [3] | 98 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [888] | 99 | ! Update data, open boundaries, surface boundary condition (including sea-ice) |
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| [3] | 100 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| 101 | IF( lk_dtatem ) CALL dta_tem( kstp ) ! update 3D temperature data |
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| [888] | 102 | IF( lk_dtasal ) CALL dta_sal( kstp ) ! update 3D salinity data |
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| 103 | CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice) |
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| [35] | 104 | IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries |
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| [3] | 105 | IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries |
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| [911] | 106 | IF( lk_bdy ) CALL bdy_dta( kstp ) ! update dynamic and tracer data at unstructured open boundary |
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| 107 | |
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| [1438] | 108 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 109 | ! Ocean dynamics : ssh, wn, hdiv, rot ! |
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| [1438] | 110 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 111 | CALL ssh_wzv( kstp ) ! after ssh & vertical velocity |
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| [3] | 112 | |
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| 113 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 114 | ! Ocean physics update (ua, va, ta, sa used as workspace) |
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| [3] | 115 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [2082] | 116 | CALL bn2( tsb, rn2b ) ! before Brunt-Vaisala frequency |
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| 117 | CALL bn2( tsn, rn2 ) ! now Brunt-Vaisala frequency |
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| [1492] | 118 | ! |
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| 119 | ! VERTICAL PHYSICS |
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| [1662] | 120 | CALL zdf_bfr( kstp ) ! bottom friction |
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| [1492] | 121 | ! ! Vertical eddy viscosity and diffusivity coefficients |
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| [1531] | 122 | IF( lk_zdfric ) CALL zdf_ric ( kstp ) ! Richardson number dependent Kz |
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| 123 | IF( lk_zdftke_old ) CALL zdf_tke_old( kstp ) ! TKE closure scheme for Kz (old scheme) |
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| 124 | IF( lk_zdftke ) CALL zdf_tke ( kstp ) ! TKE closure scheme for Kz |
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| [2236] | 125 | IF( lk_zdfgls ) CALL zdf_gls ( kstp ) ! GLS closure scheme for Kz |
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| [1531] | 126 | IF( lk_zdfkpp ) CALL zdf_kpp ( kstp ) ! KPP closure scheme for Kz |
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| 127 | IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value) |
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| [1537] | 128 | avt (:,:,:) = rn_avt0 * tmask(:,:,:) |
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| 129 | avmu(:,:,:) = rn_avm0 * umask(:,:,:) |
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| 130 | avmv(:,:,:) = rn_avm0 * vmask(:,:,:) |
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| [677] | 131 | ENDIF |
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| [1492] | 132 | IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths |
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| [1246] | 133 | DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2.e0 * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO |
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| [3] | 134 | ENDIF |
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| [1492] | 135 | IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity |
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| [3] | 136 | |
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| [1492] | 137 | IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing |
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| [3] | 138 | |
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| [888] | 139 | IF( lk_zdfddm .AND. .NOT. lk_zdfkpp ) & |
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| [1492] | 140 | & CALL zdf_ddm( kstp ) ! double diffusive mixing |
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| 141 | CALL zdf_mxl( kstp ) ! mixed layer depth |
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| [3] | 142 | |
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| [1531] | 143 | ! write tke information in the restart file |
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| 144 | IF( lrst_oce .AND. lk_zdftke ) CALL tke_rst( kstp, 'WRITE' ) |
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| [2236] | 145 | ! write gls information in the restart file |
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| 146 | IF( lrst_oce .AND. lk_zdfgls ) CALL gls_rst( kstp, 'WRITE' ) |
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| [1492] | 147 | ! |
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| 148 | ! LATERAL PHYSICS |
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| 149 | ! |
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| 150 | IF( lk_ldfslp ) THEN ! slope of lateral mixing |
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| [2082] | 151 | CALL eos( tsb, rhd ) ! before in situ density |
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| 152 | IF( ln_zps ) CALL zps_hde( kstp, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient |
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| 153 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
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| [2236] | 154 | IF ( .NOT. ln_traldf_grif ) THEN |
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| [1492] | 155 | CALL ldf_slp( kstp, rhd, rn2b ) ! before slope of the lateral mixing |
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| [2236] | 156 | ELSE |
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| 157 | CALL ldf_slp_grif( kstp ) |
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| 158 | IF ( ln_dynldf_bilap .OR. ln_dynldf_iso ) CALL ldf_slp( kstp, rhd, rn2b ) |
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| [1481] | 159 | ENDIF |
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| [2236] | 160 | ENDIF |
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| [3] | 161 | #if defined key_traldf_c2d |
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| [1492] | 162 | IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient |
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| [1239] | 163 | # endif |
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| [3] | 164 | |
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| [1482] | 165 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 166 | ! diagnostics and outputs (ua, va, ta, sa used as workspace) |
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| [1482] | 167 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 168 | IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats |
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| 169 | IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth) |
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| 170 | IF( lk_diagap ) CALL dia_gap( kstp ) ! basin averaged diagnostics |
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| 171 | IF( lk_diahdy ) CALL dia_hdy( kstp ) ! dynamical heigh diagnostics |
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| 172 | IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics |
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| [2236] | 173 | IF( lk_diaobs ) CALL dia_obs( kstp ) ! obs-minus-model (assimilation) diagnostics |
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| [1492] | 174 | IF( ln_diaptr ) CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics |
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| [1756] | 175 | IF( lk_diaar5 ) CALL dia_ar5( kstp ) ! ar5 diag |
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| [1635] | 176 | CALL dia_wri( kstp ) ! ocean model: outputs |
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| [1482] | 177 | |
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| [923] | 178 | #if defined key_top |
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| [3] | 179 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| 180 | ! Passive Tracer Model |
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| 181 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 182 | CALL trc_stp( kstp ) ! time-stepping |
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| [3] | 183 | #endif |
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| 184 | |
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| 185 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 186 | ! Active tracers (ua, va used as workspace) |
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| [3] | 187 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [2082] | 188 | tsa(:,:,:,:) = 0.e0 ! set tracer trends to zero |
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| [3] | 189 | |
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| [2236] | 190 | IF( ln_asmiau .AND. & |
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| 191 | & ln_trainc ) CALL tra_asm_inc( kstp ) ! apply tracer assimilation increment |
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| [467] | 192 | CALL tra_sbc ( kstp ) ! surface boundary condition |
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| 193 | IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr |
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| 194 | IF( lk_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux |
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| [2027] | 195 | IF( lk_trabbl ) CALL tra_bbl ( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme |
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| [467] | 196 | IF( lk_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends |
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| 197 | CALL tra_adv ( kstp ) ! horizontal & vertical advection |
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| 198 | IF( n_cla == 1 ) CALL tra_cla ( kstp ) ! Cross Land Advection (Update Hor. advection) |
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| 199 | IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes |
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| 200 | CALL tra_ldf ( kstp ) ! lateral mixing |
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| [392] | 201 | #if defined key_agrif |
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| [2027] | 202 | CALL tra_unswap |
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| [782] | 203 | IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge |
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| [2027] | 204 | CALL tra_swap |
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| [389] | 205 | #endif |
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| [1111] | 206 | CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields |
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| [1239] | 207 | |
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| [1492] | 208 | IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos) |
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| 209 | IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection |
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| 210 | CALL tra_nxt ( kstp ) ! tracer fields at next time step |
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| [2082] | 211 | CALL eos( tsa, rhd, rhop ) ! Time-filtered in situ density for hpg computation |
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| [2104] | 212 | IF( ln_zps ) CALL zps_hde( kstp, jpts, tsa, gtsu, gtsv, & ! zps: time filtered hor. derivative |
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| [2082] | 213 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
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| [1492] | 214 | |
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| 215 | ELSE ! centered hpg (eos then time stepping) |
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| [2082] | 216 | CALL eos( tsn, rhd, rhop ) ! now in situ density for hpg computation |
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| [2104] | 217 | IF( ln_zps ) CALL zps_hde( kstp, jpts, tsn, gtsu, gtsv, & ! zps: now hor. derivative |
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| [2082] | 218 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
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| [1492] | 219 | IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection |
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| 220 | CALL tra_nxt ( kstp ) ! tracer fields at next time step |
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| [2082] | 221 | ENDIF |
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| [2027] | 222 | CALL tra_unswap |
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| [1481] | 223 | |
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| [3] | 224 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 225 | ! Dynamics (ta, sa used as workspace) |
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| [3] | 226 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 227 | ua(:,:,:) = 0.e0 ! set dynamics trends to zero |
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| [75] | 228 | va(:,:,:) = 0.e0 |
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| [3] | 229 | |
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| [2236] | 230 | IF( ln_asmiau .AND. & |
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| 231 | & ln_dyninc ) CALL dyn_asm_inc( kstp ) ! apply dynamics assimilation increment |
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| [1492] | 232 | CALL dyn_adv( kstp ) ! advection (vector or flux form) |
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| 233 | CALL dyn_vor( kstp ) ! vorticity term including Coriolis |
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| 234 | CALL dyn_ldf( kstp ) ! lateral mixing |
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| [392] | 235 | #if defined key_agrif |
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| [1492] | 236 | IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge |
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| [389] | 237 | #endif |
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| [1492] | 238 | CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure |
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| [1662] | 239 | CALL dyn_bfr( kstp ) ! bottom friction |
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| [1492] | 240 | CALL dyn_zdf( kstp ) ! vertical diffusion |
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| 241 | CALL dyn_spg( kstp, indic ) ! surface pressure gradient |
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| 242 | CALL dyn_nxt( kstp ) ! lateral velocity at next time step |
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| [3] | 243 | |
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| [1492] | 244 | CALL ssh_nxt( kstp ) ! sea surface height at next time step |
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| [593] | 245 | |
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| [2148] | 246 | IF( ln_diahsb ) CALL dia_hsb( kstp ) ! - ML - global conservation diagnostics |
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| 247 | |
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| [3] | 248 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [888] | 249 | ! Control and restarts |
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| [3] | 250 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 251 | CALL stp_ctl( kstp, indic ) |
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| 252 | IF( indic < 0 ) THEN |
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| 253 | CALL ctl_stop( 'step: indic < 0' ) |
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| 254 | CALL dia_wri_state( 'output.abort', kstp ) |
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| [1482] | 255 | ENDIF |
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| [1492] | 256 | IF( kstp == nit000 ) CALL iom_close( numror ) ! close input ocean restart file |
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| 257 | IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file |
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| 258 | IF( lk_obc ) CALL obc_rst_write( kstp ) ! write open boundary restart file |
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| [3] | 259 | |
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| [508] | 260 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| [1492] | 261 | ! Trends (ua, va, ta, sa used as workspace) |
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| [508] | 262 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 263 | IF( nstop == 0 ) THEN |
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| 264 | IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics |
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| 265 | IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers |
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| 266 | IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer |
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| 267 | IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget |
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| [75] | 268 | ENDIF |
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| [3] | 269 | |
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| [75] | 270 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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| 271 | ! Coupled mode |
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| 272 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| [1492] | 273 | IF( lk_cpl ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges |
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| [508] | 274 | ! |
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| [1481] | 275 | ! |
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| [3] | 276 | END SUBROUTINE stp |
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| 277 | |
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| 278 | !!====================================================================== |
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| 279 | END MODULE step |
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